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. 1979 Mar;9(3):362–368. doi: 10.1128/jcm.9.3.362-368.1979

Partially purified antibodies used in a solid-phase radioimmunoassay for detecting candidal antigenemia.

A H Poor, J E Cutler
PMCID: PMC273031  PMID: 379032

Abstract

The development of a solid-phase radioimmunoassay procedure for the detection of Candida albicans antigens in serum of mice is described. Antibodies against C. albicans that were used in the radioimmunoassay procedure were partially purified from immune serum by a C. albicans antigen-coupled affinity column. Elution of anti-C. albicans antibodies from the column was by glucose and mannose; 4 mg of protein was recovered per ml, which contained 50% of the candidal agglutinin activity of immune serum. Also, 81% of the protein (partially purified antibody) recovered was adsorbed by whole C. albicans cells. Anti-C. albicans antibodies were either coupled to Sepharose 4B for use as the solid phase to bind candidal antigen in serum of infected animals, or radioiodinated (125I) for use as a tracer molecule to bind to the candidal antigen solid-phase complex. Although control experiments indicated that at least 100 ng of candidal antigen should be present in a serum specimen for a positive radioimmunoassay test, candidal antigenemia was detected in 70.4% of infected mice even in cases where blood cultures for C. albicans were negative. With further refinement and adaptability to human serum, the radioimmunoassay test may become a helpful tool for use in the diagnosis of systemic candidiasis.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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